Patent US4557414A successfully refreshed from Google Patents.
Patent US5077726A successfully refreshed from Google Patents.
US5077726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical disc cartridge with a flexible storage medium
Assignee: EMC Corp
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Filing: 1989-04-05
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Granted: 1991-12-31
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Expires: 2009-04-05
Abstract
Abstract An optical disc cartridge with a flexible optical storage medium, stabilized during rotation by a Bernoulli surface, is described. A flexible optical disc having an active layer capable of storing information is mounted within a rigid disc cartridge. A Bernoulli surface is provided on an inside face of the disc cartridge, in close proximity to the flexible disc, to thereby stabilize the flexible disc during rotation. The disc is rotated in order to access locations thereon during information storage and retrieval. Additionally, optical access to these locations during information storage and retrieval is also provided by the stabilizing Bernoulli surface.
Inventors
- 👤 David R. Dodds
- 👤 K. John Stahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:22
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/033; G11B23/0332; G11B17/00; G11B17/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
An optical read/write storage device, wherein said storage device is to be utilized with an information processing system capable of using rigid optical discs having a transparent layer of prescribed thickness, said storage device comprising: a flexible optical disk having an active layer capable of storing optically retrievable information, said flexible disk being rotatable during read/write operations to access locations on said flexible disk for information storage and retrieval; and a Bernoulli surface positioned proximate said active layer of said flexible disk, said flexible disk stabilized by said Bernoulli surface when said flexible disk is rotating, wherein said Bernoulli surface is proximate said locations on said flexible disk during information storage and retrieval, wherein a portion of said Bernoulli surface is transparent and wherein the transparent portion of said Bernoulli surface is of a thickness equal to said prescribed thickness.
Claim 2
Dependent Claim
140 words
An optical read/write storage device, wherein said storage device is to be utilized with an information processing system capable of using rigid optical discs having a transparent layer of prescribed thickness, said storage device comprising: a flexible optical disk having an active layer capable of storing optically retrievable information, said flexible disk being rotatable during read/write operations to access locations on said flexible disk for information storage and retrieval; and a Bernoulli surface positioned proximate said active layer of said flexible disk, said flexible disk stabilized by said Bernoulli surface when said flexible disk is rotating, wherein said Bernoulli surface is proximate said locations on said flexible disk during information storage and retrieval, wherein a portion of said Bernoulli surface is transparent and wherein the transparent portion of said Bernoulli surface is of a thickness equal to said prescribed thickness.
Claim 3
Dependent Claim
29 words
The storage device of claim 1, further comprising hub means attached to said flexible disk for rotating said flexible disk to access said locations during information storage and retrieval.
Claim 4
Dependent Claim
22 words
The storage device of claim 1, wherein said Bernoulli surface further includes wiper means for keeping said active layer free from contaminants.
Claim 5
Dependent Claim
16 words
The storage device of claim 1, wherein the thickness of said surface is approximately 1.2 mm.
Claim 6
Dependent Claim
163 words
An optical read/write storage system, wherein said storage system is capable of using rigid optical discs having a transparent layer of prescribed thickness, said storage system comprising: a flexible disk having an active layer capable of storing optically retrievable information; rotation means for rotating said flexible disk during read/write operations to access locations on said flexible disk for information storage and retrieval; an optical read/write head for projecting light towards said access locations on said flexible disk and for receiving reflected light from said access locations; and a Bernoulli surface proximate said active layer of said flexible disk, said flexible disk stabilized by said Bernoulli surface when said flexible disk is rotating wherein said projected and reflected light passes through said Bernoulli surface to access said locations on said flexible disk during information storage and retrieval, wherein a portion of said Bernoulli surface is transparent and wherein the transparent portion of said Bernoulli surface is of a thickness equal to said prescribed thickness.
Claim 7
Dependent Claim
163 words
An optical read/write storage system, wherein said storage system is capable of using rigid optical discs having a transparent layer of prescribed thickness, said storage system comprising: a flexible disk having an active layer capable of storing optically retrievable information; rotation means for rotating said flexible disk during read/write operations to access locations on said flexible disk for information storage and retrieval; an optical read/write head for projecting light towards said access locations on said flexible disk and for receiving reflected light from said access locations; and a Bernoulli surface proximate said active layer of said flexible disk, said flexible disk stabilized by said Bernoulli surface when said flexible disk is rotating wherein said projected and reflected light passes through said Bernoulli surface to access said locations on said flexible disk during information storage and retrieval, wherein a portion of said Bernoulli surface is transparent and wherein the transparent portion of said Bernoulli surface is of a thickness equal to said prescribed thickness.
Claim 8
Dependent Claim
29 words
The storage system of claim 5, further comprising hub means attached to said flexible disk for rotating said flexible disk to access said locations during information storage and retrieval.
Claim 9
Dependent Claim
15 words
The storage system of claim 5, wherein said transparent portion is approximately 1.2 mm thick.
Claim 10
Dependent Claim
18 words
The storage system of claim 5, further comprising wiper means for keeping said active layer free from contaminants.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |